The technology is not currently not available to use for Lincolnshire Police , but it could be used on roads in the county if a trial period is a success.

Hampshire and Thames Valley forces are in the process of rolling it out to traffic cops in both areas.

A spokesperson for both forces: “The technology can detect when Bluetooth is being used but cannot detect if a passenger is using the phone, but the sign will still be activated reminding motorists of the distraction of a mobile phone whilst driving."

PC Liz Johnson, a road safety officer said: "Research shows us that you are four times more likely to crash if you are using a mobile phone whilst driving, reaction times are around 50% slower than a driver not using a mobile phone.

"It is also apparent that you are twice as likely to be involved in a fatal collision when texting compared with drink driving."

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